Pump block for interfacing irradiation chamber to photoactivation patient treatment system

Claim 1

For use in a patient treatment system, a pump block assembly for interfacing a pump with an irradiation chamber, said assembly comprising: (a) a fluid conduit comprising a first segment having a first fluid port and being linked by linkages serially in flow communication with, first, a metal tube provided for incorporating therein a thermocouple, and second, a second segment, said second segment terminating in a second fluid port and having a flexible pumping section for engagement with said pump for pumping fluid through said conduit; (b) a pump block having a track-like recess for retaining said fluid conduit, said recess including an arcuate track portion for retaining said flexible pumping section of said second segment, said second segment having first and second expansions, said first expansion being provided between said metal tube and said pumping section and said second expansion being provided between said pumping section and said second port; and (c) enlarged portions of said track-like recess in said pump block for engaging said expansions, whereby said expansions cooperate with said enlarged portions to prevent creeping movement of said conduit during pumping while isolating said conduit linkages from creeping forces.